ZAERIX 6SJ7 – SINGLE TUBE (1 PC)
Black Metal Can
Made in Russia
Sharp-Cutoff Pentode 6SJ7 / 6SJ7GT / 5693
New in Original Box
Amplitrex AT1000 Tested
Up for sale is a single (1 pc) vintage NOS Zaerix 6SJ7 sharp-cutoff pentode vacuum tube, manufactured in Russia and custom-labeled for Zaerix (Z & I Aero Services Ltd, London), complete with its original green branded box. Constructed with a heavy-duty black metal envelope providing complete 360-degree electro-magnetic and RF shielding, this tube delivers whisper-quiet background operation and long-term durability. A superb replacement choice for vintage audio preamplifiers, microphone preamps, and classic instrument amplifiers taking 6SJ7 / 6SJ7GT / 5693 series tubes.
This tube has been fully tested on a precision Amplitrex AT1000 tube tester. Measured Plate Current (Ip in mA) and Mutual Conductance (uMhos) alongside percentage performance ratings relative to nominal factory reference specs (Reference: 3.0 mA / 1,600 uMhos) are detailed in the table below.
| Serial No. | Tube Section | Plate Current (Ip) | Mutual Conductance (uMhos) | ||||
|---|---|---|---|---|---|---|---|
| Reference / Result | Ref Spec | Result | % Ip | Ref Spec | Result | % uMhos | |
| SR.NO.5428005 | Single Pentode | 3.0 mA | 2.8 mA | 93% | 1600 | 1600 | 100% |
Technical Note: Custom duties and taxes are the responsibility of the buyer in their country.
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